1 /*-
2 * Copyright (c) 1988, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 #include <sys/param.h>
32 #include <dlfcn.h>
33 #include <stdbool.h>
34 #include <stdio.h>
35 #include <string.h>
36 #include <sysdecode.h>
37 #include "rtld_utrace.h"
38
39 #ifdef __LP64__
40 struct utrace_rtld32 {
41 char sig[4];
42 int event;
43 uint32_t handle;
44 uint32_t mapbase;
45 uint32_t mapsize;
46 int refcnt;
47 char name[MAXPATHLEN];
48 };
49 #endif
50
51 static int
print_utrace_rtld(FILE * fp,void * p)52 print_utrace_rtld(FILE *fp, void *p)
53 {
54 struct utrace_rtld *ut = p;
55 void *parent;
56 int mode;
57
58 switch (ut->event) {
59 case UTRACE_DLOPEN_START:
60 mode = ut->refcnt;
61 fprintf(fp, "dlopen(%s, ", ut->name);
62 switch (mode & RTLD_MODEMASK) {
63 case RTLD_NOW:
64 fprintf(fp, "RTLD_NOW");
65 break;
66 case RTLD_LAZY:
67 fprintf(fp, "RTLD_LAZY");
68 break;
69 default:
70 fprintf(fp, "%#x", mode & RTLD_MODEMASK);
71 }
72 if (mode & RTLD_GLOBAL)
73 fprintf(fp, " | RTLD_GLOBAL");
74 if (mode & RTLD_TRACE)
75 fprintf(fp, " | RTLD_TRACE");
76 if (mode & ~(RTLD_MODEMASK | RTLD_GLOBAL | RTLD_TRACE))
77 fprintf(fp, " | %#x", mode &
78 ~(RTLD_MODEMASK | RTLD_GLOBAL | RTLD_TRACE));
79 fprintf(fp, ")");
80 break;
81 case UTRACE_DLOPEN_STOP:
82 fprintf(fp, "%p = dlopen(%s) ref %d", ut->handle, ut->name,
83 ut->refcnt);
84 break;
85 case UTRACE_DLCLOSE_START:
86 fprintf(fp, "dlclose(%p) (%s, %d)", ut->handle, ut->name,
87 ut->refcnt);
88 break;
89 case UTRACE_DLCLOSE_STOP:
90 fprintf(fp, "dlclose(%p) finished", ut->handle);
91 break;
92 case UTRACE_LOAD_OBJECT:
93 fprintf(fp, "RTLD: loaded %p @ %p - %p (%s)", ut->handle,
94 ut->mapbase, (char *)ut->mapbase + ut->mapsize - 1,
95 ut->name);
96 break;
97 case UTRACE_UNLOAD_OBJECT:
98 fprintf(fp, "RTLD: unloaded %p @ %p - %p (%s)", ut->handle,
99 ut->mapbase, (char *)ut->mapbase + ut->mapsize - 1,
100 ut->name);
101 break;
102 case UTRACE_ADD_RUNDEP:
103 parent = ut->mapbase;
104 fprintf(fp, "RTLD: %p now depends on %p (%s, %d)", parent,
105 ut->handle, ut->name, ut->refcnt);
106 break;
107 case UTRACE_PRELOAD_FINISHED:
108 fprintf(fp, "RTLD: LD_PRELOAD finished");
109 break;
110 case UTRACE_INIT_CALL:
111 fprintf(fp, "RTLD: init %p for %p (%s)", ut->mapbase, ut->handle,
112 ut->name);
113 break;
114 case UTRACE_FINI_CALL:
115 fprintf(fp, "RTLD: fini %p for %p (%s)", ut->mapbase, ut->handle,
116 ut->name);
117 break;
118 case UTRACE_DLSYM_START:
119 fprintf(fp, "RTLD: dlsym(%p, %s)", ut->handle, ut->name);
120 break;
121 case UTRACE_DLSYM_STOP:
122 fprintf(fp, "RTLD: %p = dlsym(%p, %s)", ut->mapbase, ut->handle,
123 ut->name);
124 break;
125 case UTRACE_RTLD_ERROR:
126 fprintf(fp, "RTLD: error: %s\n", ut->name);
127 break;
128
129 default:
130 return (0);
131 }
132 return (1);
133 }
134
135 struct utrace_malloc {
136 void *p;
137 size_t s;
138 void *r;
139 };
140
141 #ifdef __LP64__
142 struct utrace_malloc32 {
143 uint32_t p;
144 uint32_t s;
145 uint32_t r;
146 };
147 #endif
148
149 static void
print_utrace_malloc(FILE * fp,void * p)150 print_utrace_malloc(FILE *fp, void *p)
151 {
152 struct utrace_malloc *ut = p;
153
154 if (ut->p == (void *)(intptr_t)(-1))
155 fprintf(fp, "malloc_init()");
156 else if (ut->s == 0)
157 fprintf(fp, "free(%p)", ut->p);
158 else if (ut->p == NULL)
159 fprintf(fp, "%p = malloc(%zu)", ut->r, ut->s);
160 else
161 fprintf(fp, "%p = realloc(%p, %zu)", ut->r, ut->p, ut->s);
162 }
163
164 int
sysdecode_utrace(FILE * fp,void * p,size_t len)165 sysdecode_utrace(FILE *fp, void *p, size_t len)
166 {
167 #ifdef __LP64__
168 struct utrace_rtld ur;
169 struct utrace_rtld32 *pr;
170 struct utrace_malloc um;
171 struct utrace_malloc32 *pm;
172 #endif
173 static const char rtld_utrace_sig[RTLD_UTRACE_SIG_SZ] = RTLD_UTRACE_SIG;
174
175 if (len == sizeof(struct utrace_rtld) && bcmp(p, rtld_utrace_sig,
176 sizeof(rtld_utrace_sig)) == 0)
177 return (print_utrace_rtld(fp, p));
178
179 if (len == sizeof(struct utrace_malloc)) {
180 print_utrace_malloc(fp, p);
181 return (1);
182 }
183
184 #ifdef __LP64__
185 if (len == sizeof(struct utrace_rtld32) && bcmp(p, rtld_utrace_sig,
186 sizeof(rtld_utrace_sig)) == 0) {
187 pr = p;
188 memset(&ur, 0, sizeof(ur));
189 memcpy(ur.sig, pr->sig, sizeof(ur.sig));
190 ur.event = pr->event;
191 ur.handle = (void *)(uintptr_t)pr->handle;
192 ur.mapbase = (void *)(uintptr_t)pr->mapbase;
193 ur.mapsize = pr->mapsize;
194 ur.refcnt = pr->refcnt;
195 memcpy(ur.name, pr->name, sizeof(ur.name));
196 return (print_utrace_rtld(fp, &ur));
197 }
198
199 if (len == sizeof(struct utrace_malloc32)) {
200 pm = p;
201 memset(&um, 0, sizeof(um));
202 um.p = pm->p == (uint32_t)-1 ? (void *)(intptr_t)-1 :
203 (void *)(uintptr_t)pm->p;
204 um.s = pm->s;
205 um.r = (void *)(uintptr_t)pm->r;
206 print_utrace_malloc(fp, &um);
207 return (1);
208 }
209 #endif
210
211 return (0);
212 }
213